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Finding the Third Proportional to 285.50 and 578.75

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Solution

The third proportional to 285.50 and 578.75 is: 1,173.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.50 : 578.75 = 578.75 : x
  2. Step 2: Convert to fraction form
    285.50/578.75 = 578.75/x
  3. Step 3: Cross multiply
    285.50x = 578.75 × 578.75
  4. Step 4: Simplify right side
    285.50x = 334,951.56
  5. Step 5: Solve for x
    x = 334,951.56/285.50
  6. Step 6: Final answer
    x = 1,173.21

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Why These Related Problems?

These problems maintain the same ratio (2.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.